Intel
®
Server Board S5500BC TPS
Intel® Light-Guided Diagnostics
Revision 1.0
Intel order number: E42249-003
67
Table 31. DIMM LEDs Indicator States
LED
Name
Voltage
resources
Color
Status
Description
Amber
On
Corresponding DIMM Fault
DIMM#A1-
E1 fault
(7 total)
5V Aux
N/A Off Normal
7.4 Fan Fault LEDs
The Intel
®
Server Board S5500BC has a fan fault LED associated with each fan header. In the
event of a critical threshold event status, the BMC will light a fan fault LED. The fan LED sensor
remains on until the system is reset either by a DC power-on or a system reset. Refer to Figure
10 for the location of the LEDs.
Table 32. Fan LED Indicator States
LED
Name
Voltage
resources
Color
Status
Description
Amber
On
Corresponding Fan fault
FAN fault
(5 total)
5V Aux
N/A Off Normal
7.5 Post Code Diagnostic LEDs
During the boot process, the BIOS executes several platform configuration processes with
specific hex POST code numbers. As each configuration routine is started, the BIOS displays
the POST code on the POST code diagnostic LEDs on the back edge of the Intel
®
Server Board
S5500BC. The diagnostic LEDs can identify the last POST process executed to help
troubleshoot a system hang during POST.
Each POST code is represented by a combination of colors from the four LEDs. The LEDs can
display three colors: green, red, and amber. The POST codes are divided into an upper nibble
and a lower nibble. Each bit in the upper nibble is represented by a red LED and each bit in the
lower nibble is represented by a green LED. If both bits are set in the upper and lower nibbles,
then both red and green LEDs are lit and an amber color appears. If both bits are clear, then the
LED is off.
Refer to Appendix D for a complete overview of how the LEDs are read and for a list of all
supported POST codes. For more information on the location of the LEDs, refer to Figure 10 for
the location of the LEDs.
